I heard that a long time ago and thinking back on it, I think it was due to the fact that most electricity comes from burning other stuff so the overall efficie

I heard that a long time ago and thinking back on it, I think it was due to the fact that most electricity comes from burning other stuff so the overall efficiency of burning something to make electricity (definitely not 100%), then transporting over lines to your house, then converting that into heat to warm your home is less efficient than just burning it at your house and using the heat directly.